php与mysql通讯那点事

http://www.cnxct.com/libmysql-mysqlnd-which-is-best-and-what-about-mysqli-pdomysql-mysql/

PHP5.3的mysqlnd库大大提升了数据库访问性能   http://www.iteye.com/news/380/

PHP 5.3: Persistent Connections with ext/mysqli

http://blog.ulf-wendel.de/2009/php-53-persistent-connections-with-extmysqli/